Lock.



H. W. SIMPSON.

LOCK. APPLICATION FILED SEPT.24, 1907. 920,091 Patented Apr. 27, 1909.

4 SHEETS-SHEET 1.

WIT/VESSES.'

'fmmf H. W. SIMPSON.

LOCK.

APPLIOATION FILED sEPT.24,1907.

920, @9 1 Patented Apr. 27, 1909.

'4 SHEETS-SHEET z.

H. W. SIMPSON.

LOOK.

APPLICATION FILED sEPT.24.19o7.

Patented Apr. 27, 1909.

H. W. SIMPSQN.

LOCK.

APPLICATION FILED 511191224, 1907.

Patented Apr. 2'?, 1909,

4 SHEETS-SHEET 4.

LOCK.

Specification of' Letters Patent.

Patented April 27, 1909.'

Application led September 24, 1907. Serial No, 394,267.

. of New Yl'ork, have invented certain new and useful Improvements inliocks, ol which the following' is a speeilication.

This invention relates to improvements in locks, and has particularreference to locks lor use at points where it is desirable to peri mitthe unlocking ol the lock in the manner heretofore employed b y the useof a master key. ln hotels, as an example, the general practice has beento provide a' lock which can be manipulated by a key from either side ofthe door, the key presumably being' carried by the. occupant of theyroom, a duplicate ol the key being' carried by the proper person in thehotel in order that access to the room may be had during' the absence ofthe occupant or in case ol the loss ol the key. l'n other .l'oi'ms .oflocks the structure is somewhat similar, but the lock is so arranged topermit oi' the use ol a master key by means ol which the lock may bemanipulated irrespective of the particular key lor the door beingoperated upon. With either l'orm ol' lock, if the door be locked fromthe inner side and the key retained in the lock, it is an exceedinglydill'icult mattei' to unlock the door from the outer side, since theremust necessarily be a manipulation ol the keyon the inner side ol thedoor, it generally requiringr the service olE an expert locks'mith tomanipulate the lock to ierinit ils being',unlocked Troni the outer sideand the door opened. And il the key on the inner side should have beenintentionally secured in such position as would prevent its beingmanipulated from the outer side ol the door, it will be necessary thatthe lock ilsell' be broken in order that access to theI room may be had.

ln theprcsent invention; the same general results accomplished by",thetype of lock above indicated are provided, but in addition the lockingbolt may be thrown from either side 'of the door, but in generalpractice, the unlocking must 'take place on the same side of the doorthat was used in locking' the door, so that the occupant ol' the roommay leel. reasonably sure against thel entrance of undesirable persons.ln addition, however, provision is made by means of which the lock maybe unlocked from the outer side, in cases where the locking has been ll'rom the inner side and the key remains in the door, so that underextraordinary circumstances, such, lor instance as where' the occupantof the room is in a condition Where heis unable to manipulate thelocking mechanism l'rom the inner side of the door, the door may beunlocked and access be had to the room. This result is obtained by)reviding means for retracting the latch bolt from its outer orprojected position, independent locking means being 'introduced fromeach side of the door, the means on one side beingr so arranged.relatively to the means on the other side that, under certaincircumstances, the locked position ol' one set of means can be changedto an unlocked position nipulation of the other set ol means.

The principal object ol' my invention is,

latch bolt of a lock capable ol' beingP operated from either side of thedoor and which, when in particular positions, can be manipulated tointerengage for the purpose ol a movement which will permit unlocking ofthe door.

A lurther object is to provide an indepenth ent barrel and tumblermechanism on each side of the door, each having' a latch bolt engaging'(dement, thel several elements having no operative connection exceptingwhen in a particular relative position, the movement oi' one elementwill eil'ect a displacement ol the opposing' element to permit of themove nient oli the latch bolt.

A further object ol thc invention is to provide a barrel and tumblermechanism movchange the position ol' a locking element rela- -tively tothe barrel casing.

A l'urther object is to provide a locking bolt or bolts with aconstruction of such l'orm as will permit of their beingr thrown by themovement .of the latch bolt locking; means, so that a single key wouldnot only lock the latch bolt against movement but which will, at thesame time, project the bolts into a locked position.

Other and lurther objects will appear as the invention is hereinafterdescribed.

'l`o these and other ends, therefore, my invention consists in theimproved eonstructiomand combination of parts hereinafter fullydescribed, illustrated in theaccompanying drawings and particularlypointed out in the appended'claims. y

by maable, under the action of a. key, axially to' therefore, to providelocking means for the `right in Fig. 1.

.in the drawings, in which similar refereiice characters indicatesimilarparts in each of the views, Figure 1 is a horizontal sectional View ei aioeh embodying one form of my inven tion, parts thereof being shown inelevation, the o werating parts being shown in a position where thelatch bolt is locked against movenient by the locking element carried bythe mechanism shown at the left ofthe il ure. :i is a similar view,showing the loc ing element of the mechanism at the left as havin beenmoved out of itslocked position by the ieelring element carried by themechanisin on the right in said view. Fig. 3 is a perspective view ofthe barrel and casing loc ted on the left in Fig.' 1. Fig. 4 is asimilar vien' the barrel and casing shown at the Fig. 5 is a viewsimilar to Fig. 3 'with the locking element seated within its recessinthe casin Fig. 6 is .a detail view ei the barrel an tumbler structureshown in Figs. 3 and 5, the Casin having been removed. F10. 7 shows in pan, side elevation and end e evations, the barrel and tumble-r structureshown in Fig. 6, the easing being shown 1n section. ,F1g. 8 shows 1n eigstrueture'shwii in Fig. 4, the casing showing the barrel and tumblerstructure" shown in Fig. 8, the tumblers having been moved to adifferent position by the inset-3' tion of the key. Fig. 11 shows insideele" vation, end elevation and ed fe view`, a key adapted to operate thebarre and tumbler structure shownin Fig. 12. Fig. 12 shows in planview,` side elevation and end eleva-v tions, a barrel and tumblerstructure having a multiple number of tinnblers, the casing being shownin section. Fig. 13 is a detail view showing one of the tumblers. Fig.14 is a detail view showing the tumbler-carrying member. Fig" 15 is adetail view showing a modiiied form for'applying tension to thetumbler-s. Fig. 16 is a view partly in plan and partly in' section ofthe lock mechanism ysubstantially as shown in Figs. 1 and 2, but`havinga lock bolt structure applied thereto. l Fig. 17 is a sectionalView taken online awe oi Fig. 16. Fig. 18 is a sectional view taken online :r-.r oi' Fig. 16. Fig. 19 is a view siniilar 'to Fig. 18 with thclocking bolt carrier in its inoperative position. Fig. 2() is aperspective viewof' a barrel and tuinbler structure which may beemployed in connection with tho mechanism shown in Fig. 16. Fig. 21 is aperspective View ol' a lock casing of oi'ieside of t ie than". Fig. is adetail V view ol the loching'bolt yolie. Fig. '2 3 a perspective viewshowing the loching bolts in position o n the latch bolt' .a1rior. Fig.24 is a perspective View of the latch bolt and its carrier.

` Referring to Figs. 1 to 4, and'Fig. 2l, 30 designates a cylindricalcasing of a width slightly less than the thickness pf the door, saidcasing being adapted to be mounted in an opening extending through thedoor, com. Inunicating with which is an opening leading to the edgepfthe door, the latter being suitably mortised to receive the mortisededge plate 31,. through which the latch bolt is vada' ted te operate,said plate being of any re erred iornji and not 4forming any artieu arpart of the present invention. 'l ie door and its openi are not shown inthe drawings, as it is be ieved unnecessary topartieularly show theseparts, the arrangement being obvious.

32 designates the edge plate located in the door jainb and having anopening to receive the end of the latch 'bolt when projected, said edgeplate also being of any preferred form. l y

The casing 30. is provided on its inner )eriphery adjacent its sideedges with suitable bayo'netslots 33, shown in Figs. 16 and 21, adaptedto receive the lugs 34 formed on the flange 35 of a sleeve 36 looselymounted on a tubular casing 37, the outer end of whic ris suitablysecured in the door knob if de#- sired the sleeve 36 may be securedagainst a f rotative movement to free the bayonet slot innection, by thepassage of a screw or pin through the casing and into the periphery ofthe ilanges 35, this connection being provided on one side of the door,prier to the insertion of the casing within the opening in the door, thecasing being passed through the opening in the door to secure theopposing flange, it being understood, however, that the ba onet slotconnection will be provided on eac side of the casing, a sleevel 36being provided on each tubular -casing 37. To properly position thecasing 30, within the door, l provide the rose 3E) said rose having ascrew-threaded connection with the sleeve 36, the construction being.such, that when the casing 3() and the onsings Si? are mounted withinthe door. and the roses 35) are screwed up tightly against the facesol'thcdoor relative Inovenn-.nt of the casing 30, the sleeve 36, and theroses 3Q will be prevented.

liaeh of the door knobs (one located on the outer and one on the innerside of the door) is rovided with a suitable rotatable hey-entoringplate 40, through which thchey is adapted to bc inserted into the barreland tumbler mechanism, presently described.

41 designates the latch bolt, having its outer face inclined, and havingits inner end connected by a rod 42 with a latch bolt carrier 43, asbest shown in Figs. 16 and 24. rihe carrier 4311's located within thecasing .'30,

the rod 42 extending outwardly through an opening 44 in the casing 30,the bolt 41 extending into and being adapted to be n'ojeeted out of theedge plate 31, thel latch liolt having one of its side faces providedwith a recess 45 extending laterally, within which is mounted a roller46, retained in position by a pin 47 engaging in a groove 48 formed inthe roller 46, the'construction being; such that thel outer surface ofthe roller projects bevond the plane of the side face of the latch boltto provide an anti-friction bearing for said bolt. A sprint,y 4t) isinterposed between the inner end of the latch bolt and the outer face ofthe casing 30, said spring tending to retain the latch bolt in aprojected position.

`Owing to the refatively fixed position ol` the plate 3l, theipaslatchbolt within the edge sage of the rod'42 through the casingZP will prefvent-any rotative movement of thc casing' after' the parts have beenassembled and placed in the door.

Secured within the casing l() at a point dii'inietricall)v opposite thcopening 44 is an inwardly-projectmg lug' 50, extending in a directionaxially of said casing and held against movement relative to said casingby suitable means such as a screw 5l and interlocking pins 52. 'lhe lue;5() extends inwardly a suitable distance and has its inner face providedat its end edges, with inwardly? extendingfflanges 53, adapted to bereceived within the 'barrel casingrs hereinafter de scribed for thepurpose of retaining them against ,rotative moveniept within thc knobspindles or tubular casingjs 37.

As will be seen, the openingl 44 l'or the latch bolt and the opening forthe screw 5l are dianietrically opposite and ol' equal size.

This construction is to permit thc lock-bolt to be passed v.througheither opening to per- Init the lock to be used as a right or left handstructure, as mauiv be found necessary.

rlho carrier 43 is preferably formed as shown in Fig. 24, being' oval ingeneral configuration in side elevation with the cnds of y the ovalflattened. Said carrier adjacent its rear edge is,provideil with acircular openingr 54 extending laterallyv through the carrier. thclatter having its rear wall cut away as at 55 to form a passage wayleading to the opeiiingr 54. Said carrier, when in position within thecasing 30, has its rear spaced edges strad-l dling the lut;` BQ, themovement of said car-- rier causing` thelinner face of said lug to passinto the opening'I 54 `to agreaterorless extent depending upon theldirection of movement ol' the carrier. "lhe rear portion of the carrieris provided with laterally-extendingff flanges. 56, presenting;abutmeitts which'serve as cam surfaces to retract the laitch bolt whenthe knobs are manipulated as hereinafter de scribed.

rlhe knob spindles 37 each have their inner end provided with an annularflange 57, said i i i i locked from citlicr side ol tlic door b v flange57 having its inner lace provided willi a semi-circular plate 58formintr abntments which, when the parts are assembled, are adapted toco-act with the abntmcnts on the carrier 43 to retract. the latch bolt.

lt will be understood that thc parts above described, when assembled,,vill permit olI the ordinary functions of a knob-operated latch bolt.the movement oll citlicr knob lrctractine the latch bolt b i reason ofthe opposing surfaces olI the abut ments or cani snrfaces of the knobspindle and the latch bolt carrier, and then when the knob is released,t-lie sprintr llt will automaticallireturn tlic latch bolt and itscarricr to its outer or pro iected position. 'l'hc lockingl of the dooris accomplished by preventingI tbc rciraciion if the latch bolt. l"orthis purpose, l provide a locking' clement n liicli, for thc purpose olllocking the latch bolt. is rotatable intoand out of a position directlyvin rear ol' the wall of the opening 5i located directli' in rear ol' andin alinement \iitli the rod fl' l"or the purpose oll imparting therotative movement to the lockintr element, l provide suitable mechanismlocated within thc knob spindle, and l preferably provideeacli knobspindle with a complete mechanism including' thc locking element. saidmechanism being' indc pendent of the mechanism ol' the opposingl knobspindle, so that the latch bolt may bc thc inovcmcnL ol' the lockingclement oll a particnlar knob into the lockingl position. As eachmechanism has its ov. ii locking' element, thc unlocking must generallytake place from the same side of the door as that on which thc lockingaction was applied` llowcvcr, l have provided an additional function tobc brought into operation imdcr certain circunistanccs,'\i'hiclioperation will be hereinafter described, for the purpose ol' displacing'the locking'clement olI onc ol' thc lnirrcls from its locking' position.'l`o provide this operation, it is necessari' that said clcmcnts have anadditional movement rclativcli' to the spindle, which movement isaxially olI thc spindle. As tlicsc axial movements are in oppositedirections in thc opposing' locking; elements, il is necessary toprovide dill'erent operating mechanism in cach ol' the knob spindles.And whilc thc general construction of such operatingr mechanism is thcsame in both st rlicturcs, the differences are such as to rcqnirc adescription ol'leach of the mcchanisms separately. int inasmuch as thereare general features of construction alike in both forms of thcmechanism, l will iroceed to de` sci-inc the general construction bymeans ol' wlicil the rotative movements ofthe lockine; element isobtained, and then thel particular ruci ores which permit of thedifferent lontri` tiriiiinal 'movements olI the lockingr elements. rVhiss1 ructnre is particularly shown in Figs. 3 lio l5 inclusive.

lll() roncentrically with the curvature oi' the end 5S)desigimtesthenlmerel rasing' in the 'l'oiin olI a tube open at bolliends, said casing hav 1 which are shown in the drawings, are formed ingat one end a reress 6U io receive the ihingc 53k, las liest shownini"ig. 21, by which eonl struction thel easing is hold iroin roialiveEmovement. Longitudinal movement ol' 'the V casing within the knobspindle in e. direction toward the outer end of the -:nob is preventedby the contact oll the end oi the casing with the kiff-entering plate4U, and in the opposite direction by the inner wall oi' the recess 66engaging the outer l'ace oi' the lia-nge 53;. The casing is alsoprovided with slits 6l extending crosswise of the casing on oppositesides These tunihlers are adapted to be? seated in.v

inner and outer laces ol the lug 75 being preferably rounded. Thetuinblers 67, two oi' substantially as shown in Fig. 13, having ageneral-cross-sectional shape 'oi' a right-engle triangle, the outerside of which is rounded.

the Ways formed on each side ci the plate/7l, and the curvature of theirouter faecs corre spends to the curvature o'l' tlm/inner periph ,eryoi'the casing, the tnrnblers practically thereof, said slits receiving bars62, the slits 2 being ol suiiicient depth to permit the inner face ofthe bars to pxioject Within the inner periphery of the casing, the slitsbeing located i at any/desired point in the length of the casing; theouter surfaces oi the bars 62 are rounded to conform to the outerperiphery oi the casing.

65 designates the barrel which consists of the tunibler-carrying member66 and the tuinbleis 67. The member 66 is i'orined substantially asshown in `Fig. i4, being oi a length approximai ing the length oi' thecasing 59. One oi its ends 68, that opposite the keyinserting end, iscircular in cross-section and adapted to 'lit the interior oi' thecasing, the relative sizes being such es to permita relative movement oithe vmember 66 inthe cas ing. The end 6B provided with a circumnierential groove 69 spaced from and parallel with the siirl' ace of saidend. A screw or pin 68;L extends through the casing 59, the inner end oisaid pin extending into seid groove .68. The member 66 is also providedWitha longitudinelly-extending bar 7() semi-circular inv cross-sectionand having an area approximete half the area of a cross-section of theend 68, said bei being of a suitable length. Extending radially from thecenter oi the iiattened surface of the bar l7() is a plate 71 whichextends longitudinally of the barrel and is of vsuch length as toterminate arliproximately at the free end oi the bar 7 0, a erf 72beingV formed between the ilattened surface of the bar and the inneredge of the plete, said-kerf extending inwardly a suitable distii'if'se.The bar 70 is provided with a circumferentially extending groove 73,substantially-'midway of its length, and the plate 71 is also providedwith a recess 7 4, one end oi' which corresponds in position with thegroove 73. rllie end 680i' the member 66 is provided with a lockingelement 76, in the i'orin oil a lug or projection having its outer facecurved 68, the distance between the )eriphery oi the end 68 end theperiphery oi' tie lug 75 corre- ,spondin to or slightly more than thethickness oi ine well of the casin r 59. The inner i'are oi the lug is'substantial ytiet, as shown at iiig. J4, the meeting points of thecompleting the circular forni oi the bernd/ Each tumble-nis provided'vith a ciifeu'i'nieir entially-.extending groove 6 and anext'endedrecess 7-7 Each tumbler is normally retained in an outer position bymeans ol' a spriiigv76 interposed between thecnd of the tumbler and awall ol' the end 68. Une end oi' erich tumblei' has a surf ace eX osedto the plane oi the kerf 72, and said suriaoe is provided with aprojecting in or lug 79 which, together with a pin or ug Si) located onthe opposing face of the bar 66, provide the guides for the leywards andthe tumbler-moving devices by means oi' which the parts ere placed inposition Where 'rotative movement may be lad. The key 81 is providedwith longitudinally-extending grooves 62, of such length es to provide aconstruction such that when the groove which receives the pin or lug 8l)has reached its limit of movement, the sev eral tumblers will have beenmoved to e positio'n Where the grooves 76 Will be in elineinent with thegroove 73, and thereby form e substantially complete roove around theperiphery oi' the barre. lnview of the fact that the barsz62 are solocated that, when the key has reached its movement to position thetumble-rs, they Will lie Within the lane of the groove 73' and grooves76, itvv be understood that in this position, movement oi the barrelreletively to the casing 59 may be had.

The rotative movement of the barrel Within the easing is limited by thepresence with in the casing at a point adjacent the key endthereof, ofan inwardly-extending lug 83 (see Fig. 7) projecting slightly beyond theinner periphery ofthe casing. The bar 7U has its rear endperipherally-reeeesed as at 84, said recess extendin inwardly a'distance sullicient to clear said lug 9,3 when the barrel is movedlongitudinally; but when the barrel is in its normal position, itsperipheral edges will contact With said lug 83 and thereby limit themovement of the erl rel in a rotating direction tosubstantially aone-halfrevolution. The plate 7 l and'each of the tumblers is alsoprovided with arecess, the length of seid recess ineaelimeasebeingsuilicient to prevent any eonteot'heing inadewith said lug during arotative movement,

The particular construction and arrange mentof the barrel and tumblerVso iai. de

scribed, and which ypertains solely tothe lili) i rotativnioyvinvnt olthv barrel within the i raving, is not herrin spvvilivall),v claiiiivd,as such struvtiirv toi-ins thv suh]vvt-niattvr of an appiivatioiilorLvttvizv Patviit lilvd hy inv Svptvnihe'r lLt, 15507, Svrial No.5394.266. Thvivlore ,l do not livrvin dvsrihc iii iiiiniitv dvtail thvpart'viilai vonstiuvtion of thv parts, it living understood that thvytun'ihlvrs when unavtvil iipon hy thv livy'f aiv so locatvd i'vlatiwlivto onoof thv bains` i looking and unlovking niovvnivnts must be from thvsainv sidv ol' thv door, is iindvsirahlv and l providv an altvrnativvvonstruvtion by ii'ivans ot wliivh thv lovliiirgr vlvinvnt 7.5 otonoinvvhanisni van hv displavvd hy thv invvhaninni oll thv opposing'vlvnivnt in Asuvh inaiinvr as to pvr=iit thv htvh holt to hvi'vtriivtvd. ythis altvrnativv o'pvration is pi'ovidvd hy pvl'niittingthv harrvl oi" vavh oll thv nivi-hanisms to niove axially. Snr-h axialiiiovvnivnt inust hv avvoinplishvd h v thv hvy on onv sidv ol' thv door`and thvrvlorv thv inoi'viiiviit niust nv in a dirvvtion to disphivv thvlug To oll thv oppoaing nivvlianisin. And sini-v tlivrv arv providvd nooi'vr-hipping poi-tions otA thv opposing lugs 7F., thv displaving ollthe l lutgr vannot hv h r a rotativv nioifvinviit, so

pliiation iilvil Svptvinhvi' 24th, 14307, Serial i Niniihv'r ztttgtt,diy-loam; and vhiinis thv torni otv v vlindvr lot-,k Ahown livrvinhaving a longitudinal niovvni-vnt olI thv opvratingfv hip;

in addition to thv rotary niovvinvnt thvrvoli.

'lhv normal position ol thv lug T5 is that whvrvin it lifs; within thvrvvvss tornivd hvtwvvn thv tlaiigm .-33 otl thv lngl 5t), iii whivhpoition thv'knoh van hv rotatvd to opv'rati` thv hitvh holt in thvinannvr hvrvtoloi'v dvsvrihvd, thv luy; prvsvnting no obstruction to thvpassagv ol' thv vari i' 4.3 in thv dii'vvtion to rvtravt thv latvh holt,lt', howvvvr, thv hoy hv inavrtvri and thv tuinhlvrhy vaiiivd to tliviipropri' position, and thv harivl iotatvd until it havI rvavlivd itsopposite vX tivmo of nioif'vinvnt. thv lug 75 will liavv hvvii vai'rivdto thv position shown in Fig. 2l, whvrv it livs dirvvt ly in rvar of thvfront wall of thv opvning 54. ln this` position7 thv, latvh 'boit islovlivd against a rvtiacting niovvinviit. and sinvv thv varrivi 43, isheld from nio.f'vnivnt thv kiiohs a-rv also hvld against. inoi'vinvnt,as thv inovvniviit of tho` latt'vi.van taliv plat-,v only wlivn thvvaiiivi Llit is pviinittvd lo hv rvtravtvd.

Eavh lug 73', forming thv lovl ing vlvnivnt,

projvvtsinwardly appioxiniatvly onv hall` ol' thv width ol' thv vari'ivr42;, and as vavh locking vlvnivnt ma)r hv opvratvd indvpvndvntly h5' apioilivr hoy, it will hv undvi'stood that the-lorhiiig niovvniv'nt ollvithvi lng: 75, will piovidv :in vttvvtiial lori; against thv inovvmviitol' thv latvh holt rvgardhiss oll thv position ol' thv lug` 71'.-iiipportvd hy thv other knol. Obviously, thvrvl'orv, in ordvr to unloi-ltl thv lat-oh holt, it is nvvvssariY that thv opvratinifinvvhanisin olf thv lug 75 holdingr thv lati-li holt in its lovlivdposition, inuvt hv inanipulatvd to rotatv thv harrvl to varia Ithv ha;to its inopvrativv position. llviiv' it 'will hv iiiidvrstood, that thvlot-.l inuvtnhv as a gvnvral proposition, urilockvd l'roni thv annivaidv ol' thv door as that on which thv looking movvmvnt toolt place. Ashvrvtoiorosvt l'orth, under vvrtain oirviinistanvvs, auch limitation inrvquirintf that thv whivh iis' j varrivr 43.

that it inust hv in a dirvvtioii to carry the lug vntirvly out oll thvpath oll niovvmvnt ol' thv VVliili` oiiv ol' thv lugs 75 is therel'orvniovahlv to a point vntii'vli' within its casing', thv oppohiiitr luglwhich has a inovvj nivnt svrring;I to inahv siivh displavvnivnt,

must also havv a longitudinal inovvinvnt. llndvr tlivtivvii-vuinstanvvs, it will hv iindvr Astood that thv displavinginovvinviit is liniitvd vntirvlv to thv lug' on o iivsidv olI thv. door,sinvv it is not pravtivahlv to provide a stravtiii'v whit-li nia)Y hvniovvd longitudinally in vithvi' dii'vvtion t'roiu an iiitvrnivdiatvposition. l thvrvl'orv plavv thv lug, whivh is rapahlv ot' livingdiaphivvd on thv innvi` sidv ot' thv door, so that it would hv.iniposai'hlv l'or an occupant ol a room to so inanipiihitv thv lockingnivvhaiiisni as to prvvvnt an unlovlting 'li'oni thv oiitvi sidv oll thvdooi'. This displacing opvi'atioii is oht-ainvd in thv l'ollowingrinannvi', it living uiidvrstood that thv loi-hingn nivnihvi on thviiinvi: sidv ol' thv door is niovahlv to a position within its vasing,and that on thv outvi' sidv ol thv door is movahlvl to piojvrtsu'hstaiitialliY avi-oss thv path ot' niovvnivnt ol thv vairivi A't3 andhv rvturnvd to itsv norinal position. thv particular arrangivinvntolthvparts l'or pvrt'orining thvsv opvrationny living livrvinnl'tvi'dvsvrihvd. Whvn thv lug 75, opvrativtJ t'roiii tliv innvr side ol' thvdoor is in its lovltvd position, said lug, as hvrvtol'orv pointvd out,is lovatvd di rvvtly in tho rvar ol` and in voiitaot with tht` l'rontwall ot varrivr 4th llI it is dvsird iinlovk thv door l'roin thv oiitvi'sidv, thv propvr lvy vonsti'urtvd as lahoiwi in Fig. 9)" is insviivdl'roiii that Sidv :indthv lug 75 ol' that partivular invvhanisrzi isalso niovvd to zi lovking position, so that hoth lug` 75 liv in thvsanlv planv. ll', with thv lugav in this position, prvssiirv is applivdto thv vnd'ol thv hoy on thv oiitvisido oi' thv door, thv harivlfot thatSidvl will hv loi-vvd inwardly variwing'wilh it its lug 75. which inturn nfovvs thv hipr Tt oll thv opposingl nivnihvr into its raising' andvntirvlv out oll thv path ol' inorvniviit oll thv ziirivr 42%` 'thvprvssurv is,thvn rvlivvvd, whvrviipon thv harrvl which has hven prolltbe rei rarted by :i sin-.ple rotative iiioveiiient i olI the doorlliol),

'lhe barrel structure located on the inside oll the door dili'ers onlyl'roiii the above described in providing the end 68 with a groove S4leading l'roiii the groove (59, toward the outer siii'l'zice ot' saidend, and in` providing a llai side N5 on the periphery ofthe bar 70,.adjacent the groove 73, such changes pei'- mittiiig the pin o8" to ridewithin the groove i si, and the har (i2, which will be in alinement withthe lhi-t side X5, to leave the groove 72u and ride over the surlace oisaid lat side.

The rasing o!) is provided with a recess 63 i within which the lug 75inay pass, leaving l thi` ond ol' the casing free from projecting i Whensaid lug has .been laced in l surfaces. this position, as abovedescribed, it will be retained therein until a ke has been againinserted into the bai-rch when the inserting movement will cause the lugto resume 'its normal position relative to the easing of the barrel, andthe barrel is then rotated to bring j the lug to its normal inoperativeposition, it being understood, of course, that the barrel cannot berotated white the lug 75 is located i within the recess 63.'

The barrel and casing structure shown on the right in Figs. 1 and 2differs from that I shown on the left, the differences in construe-.tion of said barrel being now pointed out.

ln. this construction, the groove 84,'ilatside 85, and recess 74 extendin the opposite direction from the grooves 69 and 73, and its positionin the plate 71, respectively; This e permits the barrel to be projectedfrom its easing instead of being withdrawn into the casing as is thecase with-the opposing barrel. Since there is no provision in the keyfor providing a reverse axial movement to said barrel, independentprovision is made for returning the barrel to its normal position whenthe pressure on the key is relieved. This mechanism ,consists of aspring '86 mounted within a longitudinal recess 87 formed in the bar 70adjacent the outer end thereof, said recess leading from acircumferventialgroove 88 formed in said bar and the plate ,71 andcontinued in the tumblers in a y proper# position thereon relativelf tothe 60 '7189 'extends through the casing 59 and has its groove-76, sothat whenV the? tumblers are properly-positioned@ permit the rotativemovemena a'complete circumferential groove .willfbe' formedaround the.barrel. A screw inner end' projected into said groove 88.

Within thef recess 87 ,and located intermedi- 1 ate the springl 86 andthe groove 88, is a fol- '65 lowerblock 90,-'which'when the barrel haslbars-in their retractec l been rotated to a point which will bring saidblock in alinenient with the screw 89 (the position in whichlongitudinal movement of the barrel is einiitted) such longitudinalmovement wili) 86, and thereby place the barrel under spring tension.When, therefore, the pressure on the key is relieved, this tension willreturn the barrel to its normal position as shown in Fig. 1. l

lt will be understood that in-eaeli of 4the forms of barrel shown in thedrawings, the longitudinal movement of the barrel can take lace onlywhen the barrel is in one particuar position; in the form shown attheleft in Figs. 1 and 2, this movement can take lace only when the lug isin alineinent wit i the recess 63, and this alinement is provided onlywhen said lug has reached its locking position. Inv the forni shown atthe right in Figs. l and 2, the longitudinal movement can takeplace onlywhen the follower block 9() is in alineinent with the screw S9, and theparts are so arranged that this alining position is assumed only whenthe lug 75 oi the part icular barrel structure is in its lockingositioii. From this it will be obvious that w ile each barrel may berotated on its axis between certain extremes of movement by the key,whenever the proper key has been placed in position to move thetuinblers to points within which rotative movement is'perinit- 5 ted,longitudinal moveineiitcan take place only when the barrels are inapredetermined position, so that there is no liability of disi placingthe parts when the lugs are in other l than the desired position.`

The construction heretofore described* E vides simply for the use of alatch bolt n one as the door securing element, the latch bolt structionis shown in Figs. 16 to 23, consisting in i'oviding one o r morelongitudinally loor jamb. -In order able o enings in the.A

` of a different key or that tiere be no nec tively to thc remainingparts of the latch bolt mechanism so as toA permit of their'be" ingpositive] movement o t ie ln 75, and retracted by the movement of a nob"spindlejafterthe lug 75 has been moved to its ino erative osition, thecarrier or yoke for t e. locking bars being arranged to` engage andcatch when in its reti'.i,cted )osition to retain the position Withoutin tend to compress the spring movab e bars or bolts which are adapted.tobe projected or retracted into andfrom suity of a double locking orunlocking of the parts, Y these bars are arranged in position relaicoserving its usual pur oses when permitted to and `beine' looted againstsuch Inove-v ioo v in position tostrengthen the holding effect, ybetween the door-,and its jamb. Such conrejected during the locking anyway limiting the succeeding projecting movement of the latch bolt, Theparticular mechanism for producing these results will now be described.

5 When the locking mechanism is to beprovided with the locking bolts,the cai rier 43 is bil'ui'eated at its rear as shown at al in lig. 23,to receive a yoke 92, shown in Fig. 'L in detail, said yoke having thegeneral contiguration of the carrier 43, but being` relatively narrow tofit within the recess formed bifnrcated ends of the carrier. b'aid yokeis by t lie i also provided with rods 93, screw threaded at their outerends, said rods being parallel l5 with each other and adapted to extendthrough orrooves h4 formed on the flattened ends of t ie carrier, or,ill desired, said rods may pass through openings formed in the i videdwhich would prevent the longitudinal movements of the barrels asheretofore set forth.

ln view oll the lact that the opening 54 is circular, the locking andunlocking ofthe lugs 75, whether the lock be formed with r without thelocking holt structure will notI ail'ect the position o1' the carrier 43to change its position relatively to the casing; in other words, thehitch bolt structure is not operative in an,Y respect by either oithelugs 75, the movement ol' said structure being entirely by the knobspindles. As heretofore pointed ont, however, the projecting movementoll the yoke is provided by the lugs 75. lt is also to he noted,moreover, that il the spring 4) becomes broken or defective, thelatch-bolt structure and carrier 43 would be carried forward by the lug7:3, upon a proper action oll a key iii the opera-tion'ol` locking andthe door thus secured.

While l have herein shown ,and described one form ol' a lockiacchaiiisni which w illproduce thc results desired by nie, as indicatedin the keeper to forni additional locking` means. For the pu'r .osc ofretaining 'thc yoke 92 in its retracto position l provide the lug 5()with a yoke-engaging device Q6 located 3Q inthe ath ot' movement of oneof the ends ol' the yolie.

hereinafter, it is to be understood that the specific structure shownand described docs not comprise all olI the structures which might beemplovcd l'oi' producing the results l aimed at; l do not therefore,-limit iiiyscll' 'lhe yoke 92 normally reiiiainsjn its retractedposition, as indicated iii Fig. 19.

, scope ol' the Iinvention as disclosed iii the When the lug 75 ofeither of the locking inechani'snisis rotated to place said lug in its ioperative position, the movement of the lug in iassir'f to this positioncauses the yoke 92 -to )e carriedforward and thereby )i'oject the barser rods 95, forming loeli'ing'lbolts, into the doorjanib. i0 the doorthelug 75 which is in the locking position, is rotated to its inoperativeposition, thereby releasing the carrier 455 and placing t he parts inposition where the operation ol' one of the knobs will retract the cai'-45. riei' 45S. As the yokeflB is located within the carrier 43, suchretractiiig movement of the latch bolt will carry with it the yoke U2,thc

'hen it is desired to unlock .movement being continued until theengage?" ment oi the yoke with the engaging device S16 30 takes place,after which, a release olI thc door knob will permit the spring 49 tocarry the latch bolt and carrier 43 to its projecting position, theengaging device EHS retaining the l yoke in its retracted position. 'lhepresence of the. yoke 912 docs not afl'ect the operation ol' the partsto dr' lice the lng 75 as heretofore. described, it .seing understoodthat the I;

lugs 75 are of suflicient width to extend substantially half way acrossthe width oi' the G0 yoke, so that the lug 75 on either side will opicrate to lock the carrier and move the yoke to its projected position.And, inasmuch as the dis lacing movement ol the lug takes place w en thecarrier and yoke are in a projee-ted position, no obstruction will beprovwith the latch-bolt, eac

to such specific structural details, but claim the right to isc any andall inmhiications lhereoll which f'nay l'all within the spirit aii'dAsleeve. 36, as designated at 75^ in Fig. 2.

llaving thus desciibed my invention and pointed out one l'oi'ia in whichit may be carried into ell'eet, what I claim as new, iszl. In a lock,independent latch-holt operating knob-spindles each having an elementtor preventingr movement ol' theI spindles when the element is iniosition to coperate li spindle being movableindependently of itselement.

2. ln a lock, a latch-bolt, indcpelidently` operable knob-.siiiidles foroperating said holt, a bolt-locking"elentept carried by each spindle andnormally lying within an inoperative position, each ot' said spindlesheilig operable iiidepcndently ol' its cleinentwhcn both elementsl areinl inoperative position, and means l'or moving either elenient into a,position to retain the bolt locked.

3. ln a lock, a latch-bolt, independentlyoperable knob-spindles foryfaetuating said latch-bolt, and a bolt-locking element carried by eachspindle for retaining the boltin locked position, cach knob-spindle andits bolt-locking element being movable independently oll each other.

4. In a lock, a latch-bolt, independentlyoperable knob-spindles foractuating said 4bolt, a rotativo locking clement supported by sition,the path ol' rotative movement ot'v either element being in a singleplane at right angles to the aXis ol' the element, and means independentof the knobspindle for rotating its element to lock the bolt.

5. In a lock, a latch-bolt, knob-spindles fora-ctuating saidbolt, alocking element carried by each. spindle to retain said bolt in lockedposition, each ol said elements normally extending into the path ofmovement of the bolt and being normally in a position to permit 'freemovement of the bolt, and means for moving either element into lookingposition relative to the bolt.

6. In a lock, a latch bolt, knob spindles for actuating said bolt, saidspindles being spaced from each other to provide a passa eway for thebolt therebetween, a loc ring e ement carried by each spindle, eachelement being movable from'positions at either eX- treme or" the path ofmovement of the latch bolt,the element in one of said positionsretaining said bolt a ainst movement.

l normali f Y''n a-locl, a atch bolt, knob spindles for .actuating saidbolt, said spindles being spaced from each other to provide a passagewayfor the bolt therebetween, a locking element carried by each spindle,each element being rotative from positions at either eX- treme of thepath oi' movement of the latch bolt, the element in one of saidpositions retaining said bolt against movement.

8. ln a lock, a latch bolt/,knob spindles actuating said bolt, saidspindles' being spaced fromeach other to provide a assagerway for thebolt therebetween, a loc ing ele- 40 l .ient carried by each indle toretain, when in one position, said bo t in a locked position, saidelements being 'operable independently ol' each other and of either knobspindle, the movement ol the knob spindles and their clements beingindependent of each other.'

0. ln a lock, a latchzboit andtits carrier iected; mob-spindlesoperatively connected with the carrier to retract said bolt, saidspindles being spaced from each other to provide a passageway for saidcarrier, and a locking element extending into the path ol`. the carrierand movable into a position to Contact with the carrier to preventretraction ol' the bolt.

il). ln a lock, a' latch bolt and its carrier y no'rinz'illy inaposition with the bolt projcnted,

knob spindles operatively ciinneoted with. the carrier to retract saidbolt, said spindles being spaced from each other to provide a passagewayfor said carrier therebetween, and anl inrlopondvntly-operablo 'lockingelement carried by nach'spindle, cach` element in a position with thebolt .pro-" being normally in the path of and movable'A into a positionto contact with the carrier lo prevent retraction ol' .,ho bolt.

.l-l. vin a lock, a spring-proiirctod latch bolt and its carrier,indi-ponilontly--operablo knob spindles operaiHoly-connor!rd iviih saidcarrier to retract the bolt, and a locking element extending within saidrarrirr and movable' to a position to retain thil rari-ier againstmovement.

l2. in a lock, a spring-projortcd latrh boil and its carrier, knob siindles for pendently retractin(T said latch bolt, a locking elementcarried zby each spindle and normally extending Within the carrier, theopposing elements having inde endent paths of movement, either elementeing inovabloI to a position to retain the carrier against movement.

indoi 13. in a lock,`a spring-projected latch bolt and its carrier, thecarrier having a laterallyextending opening, knob spindles forindependently retractin said carrier and bolt, and an indeendently-operable elementcarried by eac spindle and extending Within theopenin of said carrier, each element being movab e therein to a positionto retain the carriera'gainst movement.

le. In a lock, a s ring-projected latch bolt and its carrier, saicarrier having a circular laterally-extending opening, and a lockingelement extending Within. said opening and havingla path of movementcorresponding With t e periphery of said opening when the carrier is inits projected position, said elev ment, in 'one position, retainingthe-bolt against movement 15. In a lock, a s

cured tovsaid casing'and extending within the biturcated ortlonof saidcarrier, said lug controlling t ie path ol movement ot' said carrier,land a locking element extendin Within said opening and normally locate.adjacent the face of said lug, said element being movable to a positionto. ret-ain the carrier against movement. I

17. In a lock, Va spring-projected latch bolt and carrier, saidy carrierhaving a laterally-extending opening, and having cam surfaces onoppostev'sitles thereof, a knob spindle'.

ring-projected latch bolt i and its carrier, sal earner havin f aclrcular ce l anism from its lockingl ing, movement being 1n a directionat sub-` soepel locking element extending within said opening, andmovable to a position tov retain the carrier against movement. Y

18. ln a lock, a latch boit, and locking means therefor', the lockingand' unlocking` of the bolt being normally limited te the same sideiofthe lock, the position of said means at a redetermined point permittingan additional movement from one of the sides of the lock to dis lace thelocking engagement from the ot ier side of the lock said movements beingin a direction at substantial right angles to the plane of the path ofmovement of the bolt.

19In a lock, a latch-boit, and locking means therefor, said means comrising inn dependent lockingr mechanisms oca/ted on op osite sides ofthe axial plane oi" the latchbo t, each mechanism being normallyoperative only from that side of said plane on which it is located, saidmechanisms when moved to a predetermined locking position permitting anadditional movement of one of the mechanisms to displace the othermechposition, the displacstantially right angles to the plane oi thepath ol' movement of the bolt, -said mech- .anisms being held against adisplacing move nient in'the opposite direction.

20. in a locli, a latch bolt, actuating means therefor, and independentbolt-locking;l eledoor, one ol" said elements being displaeeable axiallyfrom its locking position by the operation of the opposing element 2].In a loch, a latch bolt, actuating means tlierrd'or, and independentbolt-locking elements operative from opposite sides of the door, .one olsaid elementsI being `displaceablo'axially l'roni its locking positionby the operation ol' the opposiner element when i'noved to a position inalinement therewith.

22.111 a lock, :i latch' bolt, aigftiiatingi means therefor, andindependent bolteloeliing; elements operative from opposite sides ol'the door, said elements normally lyingjr within the path oll movement olthe latchbolt, one of said axially from its locking. position by themovement of tliefoiiposing element to its locking position followed byan axial mo\'ement of both elements.

23.j1na lool-i', a. latch bolt, actuating means therefor, andindependent bolt-leck ingr elements operative from opposite sides ot thedoor, said elements each being rotative to a position to loci; the bolt,and' each being movable axially oniy when in such locking position',

24.111 a lock, a latch bolt, actuating means therefor, and independentbolt-lockn-l elements being disiilaeeable' elements inoperativerelatively ments operative lrom opposite sides of the i ing elementsoperative fromopposite sides of the door, said elements having a limitedrotative iiio\-'ciiient, one extreme of which is at a point to piave theelements in alinement, each of said elements beingT movable axially`when in alinedpositidmsuch axial movement rendering` one of theelements inoperative relatively to the. bolt. l

25. 1n a lock, a latch bolt, actuating means therel'or, and independentbolt-lock` ing elements operative from opposite sides of the door, saidelements each being rotative. to a locking position, one of saidelements being displaeeable axially While in such locked position.

2li. 1n ii lock, a latch boit, means theri'iior, and independentbolt-lock ing elen'ients operative from opposite sides of the door, saidelements normally lying' Within the path of movement of the latclibolt,said elements each boing rotative to a locking position, one ol saidelements being displiweable axially by the opposing element while insuoli locked position.

27. In a lock, a latch bolt, independent knob spindles for actuatingsaid bolt, and barrel and tumbler ili'iechanisn'i carried by eachspindle, each n'ie'chanism having; a boltlocking element, each el saidn'ieehanisms having a limited rotativemovemeiit to place the elements inalineniont7 and each meeh-- anism being' movable longitudinall)r whenthe elements are in iheir aliuedlocking` position, such movementrendering; one of the to the bolt; one ol' said mechanisms beingpositively nioved. longitudinally by the other mechllllSlll.

2H. ln a lock, a hitch bolt, independent knob spindles for actuatingsaid bolt, and' barrel and tumbler mechanism carried by each spindle,`each mechanism having a belli locking element, each of said mechanismshaving' :l limited rotative movement to place the elements iiialiiieinent, :ziii'ili'eiich 1ne h- :mism being movable longitudinallywhen the eleiiieiils are iii their alined locking' position.

29.111 a. lorli, a latch bolt,

actuating means therefor,

and indeiiiendcnt bolt-locke ing elehieiits` operative from oppositesides ol the door, said elements each being; displai'eable axially andonly while bolli are in siieh locked position.

30. 1n a lock, a latehbolt, independent actuating knob spindles foractuating' said bolt, and

barrel and tumbler mechanism carried by each spindle, each nieehaiiismhavingr a boltloeking element, each oi said mechanisms having a limitedrotative movement to place the elements in alinement, and each mechanismbeing' movable longitudinally when the elements are in their alinedlockingy po sition, such movement rendering one oi the elementsinoperative relatively to tlieboit,

the remaining element being rendered inoperative by a return toitsunlocked position.

31. In a lock, Ia latch-bolt, independent knob-'spindles for actuatingsaid bolt, and a bolt-locking clement supported by each spindle, each ofsaid elements having alimited rotative movement to place them in lockingposition, each element being movable longitudinally, the longitudinalmovementbeing permitted only when the elements are in locking position.

32. In a lock, a latch-bolt, independent knob-spindles for actuatingsaid bolt, and barrel and tumbler mechanism carried by each spindle,each mechanism having a boltlocking element, each of said mechanismshaving a limited rotative movement to place its element in lockingposition, said mechanisms each having a' longitudinal movement, saidlatter movement being permitted only when both elements are in ockingposition. l

33. Inv a lock, a latch-bolt, independent knob-spindles for actuatingsaid bolt, and a bolt-locking element supported by each spindle, each otsaid elements having an independent limited rotative movement to tplaceit in locking position, said elements ein movable longitudinally, thelongitudina movement in one direction being permitted only when bothAelements are in locking position.

34. In a look, a latch-bolt, independent knob-spindles for actuatingsaid bolt, and a bolt-locking element supported by each spindle, each ofsaid elements having an independent limited rotative movement to placeit in locking position, said elements being. movable longitudinally, thelongitudinal movement in o'ne direction being permitted only when bothelements are in locking position, the combined longitudinal movementbeing controlled solely by the actuating means for one of the elements.Y In a lock, a latcli-bolt, independent knob-spindles for actuatingsaidbolt, and ai bolt-locking element supported by each spindle, cach ofvsaid elements having yan independent limited rotative movement to placeit in locking position, vsaid elements each being movablelongitudinally, the longitudinal movements being permitted ony when theelements are in locked position, the longitudinal movement of one of'theelements in one direction when both are in liu-lied position moving theother element to an inoperative position without unlocking the bolt, thereturn movement of the actuating element retaining the bolt locked untilrotated to inoperative position.

36. In a lock, a latch-bolt, independent knob-spindles for actuatingsaid bolt, a boltlocking -lement supported by each spindle, each of saidelements having an independent limited rotative movement .to place it inlocking position, said elements each being movable longitudinally, thelongitudinal movements being permitted only when the elements are inlocked position, means for positively moving both elementslongitudinally in one direction when both. are in locked position, andindependent means tor moving one of the elements in the opposite ydirection to return it'to rotative position.

37. In a lock, a latch-bolt, independent knob-spindles for actuatingsaid bolt, a boltlockin element supported by each spindle, each. o saidelements having an independent limited.rotativemovement to place it inlookinU position, said elements each being movable longitudinally, thelongitudinalA movements being permitted only when the elements are inlocked position,' a key for positively moving both elementslongitudinally in one direction -When both are in locked position, andspring-actuated means for movin one of the elements in the oppositedireetlon to return it to rotative position.

38. In a lock, a latch-bolt and its operating mechanism, means forlocking said latch-bolt against movement, and a locking bolt movableinto a locking position by the latch-bolt locking means, the unlockingmovement of the locking-bolt being independent of the movement of saidmeans.

39. In a lock, a latch bolt audits operating mechanism, means forlocking said latch bolt' against movement, and locking bolts movableinto'a looking position by the-latch boltv locking means, the unlockingmovement of the bolts being provided by the retracting movement of thelatch bolt.

40. In a lock, a latch bolt and its operating ,I

mechanism, means for locking said latch bolt against movement, andlocking bolts movable into a locking position by the latch bolt lockingmeans, the unlocking movement oi the bolts being provided by theretracting movement of the latch bolt, and means for retaining saidbolts normally in an unlocked position.

41. In a lock, a latch bolt and its operating f mechanism, means forlocking said latchbolt against movement, and locking-bolts supportedbythe latch-boltand movable therewith in one direction, the movement inthe opposing direction being simultaneous with the movement of the.latch-bolt locking means to its operative position.

In testimony whereof I allix my signature in presence oi two Witnesses.

. HENRY W. SIMPSON.

Vr'itnesscs:

[Iowiinn Conn,

